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1
19
20
28
29 package org.netbeans.modules.xml.xdm.visitor;
30
31 import java.util.List  ;
32 import org.netbeans.modules.xml.xdm.nodes.Attribute;
33 import org.netbeans.modules.xml.xdm.nodes.Document;
34 import org.netbeans.modules.xml.xdm.nodes.Element;
35 import org.netbeans.modules.xml.xdm.nodes.Node;
36 import org.netbeans.modules.xml.xdm.nodes.NodeImpl;
37 import org.netbeans.modules.xml.xdm.nodes.Text;
38 import org.netbeans.modules.xml.xdm.nodes.Token;
39 import org.netbeans.modules.xml.xdm.nodes.TokenType;
40 import org.w3c.dom.NamedNodeMap ;
41 import org.w3c.dom.NodeList ;
42
46 public class PositionFinderVisitor implements XMLNodeVisitor{
47
48 int position = 0;
49 Node node;
50 boolean found;
51
52 public int findPosition(Node rootNode, Node node){
53 reset();
54 this.node = node;
55 rootNode.accept(this);
56
57 return position;
58 }
59
60 public void reset(){
61 position = 0;
62 found = false;
63 }
64
65 public void visit(Document doc) {
66 position += getLengthOfTokens(doc);
68 NodeList nodes = doc.getChildNodes();
69 for(int i = 0; i < nodes.getLength(); i++){
70 Node n = (Node)nodes.item(i);
71 n.accept(this);
72 if(found) return;
73 }
74 }
75
76 public void visit(Element e) {
77 if(e.getId() == node.getId()){
78 found = true;
79 } else{
80 position += getElementStartTokenLength(e, true); NamedNodeMap attrs = e.getAttributes();
82 for(int i = 0; i < attrs.getLength(); i++){
83 Node attr = (Node)attrs.item(i);
84 attr.accept(this);
85 if(found) return;
86 }
87 position += getStartTagWhiteSpaceTokensLength(e); position++; NodeList children = e.getChildNodes();
90 for(int i = 0; i < children.getLength(); i++){
91 Node n = (Node)children.item(i);
92 n.accept(this);
93 if(found) return;
94 }
95 position += getElementStartTokenLength(e, false); position += getEndTagWhiteSpaceTokensLength(e); position++; }
99 }
100
101 public void visit(Text txt) {
102 if(txt.getId() == node.getId()){
103 found = true;
104 } else{
105 int txtLen = getLength(txt);
106 if(txtLen > 0)
107 position += txtLen;
108 }
109 }
110
111 public void visit(Attribute attr) {
112 if(attr.getId() == node.getId()){
113 position += getLeadingWhiteSpaces(attr);
115 found = true;
116 } else{
117 position += getLengthOfTokens(attr);
118 }
119 }
120
121 private int getLength(Text n) {
122 int len = 0;
123 for(Token token:((NodeImpl)n).getTokens())
124 len += token.getValue().length();
125 return len;
126 }
127
128
135 private int getElementStartTokenLength(Element element, boolean beginTag){
136 String value = "";
137 List <Token> tokens = element.getTokens();
138 for(Token token : tokens){
139 if(token.getType() != TokenType.TOKEN_ELEMENT_START_TAG){
140 continue;
141 }
142 String tokenValue = token.getValue();
143 if(beginTag){
144 if(!tokenValue.startsWith("</")){
145 value = tokenValue;
146 }
147 } else{ if(tokenValue.startsWith("</")){
149 value = tokenValue;
150 }
151 }
152 }
153 return value.length();
154 }
155
156 private int getStartTagWhiteSpaceTokensLength(NodeImpl node){
157 StringBuilder buf = new StringBuilder ();
158 List <Token> tokens = node.getTokens();
159 for(Token token : tokens){
160 if (token.getType() == TokenType.TOKEN_ELEMENT_END_TAG){
161 break; }
163 if (token.getType() == TokenType.TOKEN_WHITESPACE) {
164 buf.append(token.getValue());
165 }
166 }
167 return buf.toString().length();
168 }
169
170 private int getEndTagWhiteSpaceTokensLength(NodeImpl node){
171 StringBuilder buf = new StringBuilder ();
172 List <Token> tokens = node.getTokens();
173 boolean counting = false;
174 for(Token token : tokens){
175 if (token.getType() == TokenType.TOKEN_ELEMENT_START_TAG){
176 if (token.getValue().startsWith("</")) {
177 counting = true;
178 }
179 }
180 if (! counting) continue;
181 if (token.getType() == TokenType.TOKEN_WHITESPACE) {
182 buf.append(token.getValue());
183 }
184 }
185 return buf.toString().length();
186 }
187
188 private int getLeadingWhiteSpaces(Attribute attr){
189 Token firstToken = attr.getTokens().get(0); if(firstToken.getType() == TokenType.TOKEN_WHITESPACE){
191 return firstToken.getValue().length();
192 }
193 return 0;
194 }
195
196 private int getLengthOfTokens(NodeImpl node){
197 StringBuilder buf = new StringBuilder ();
198 List <Token> tokens = node.getTokens();
199 for(Token token : tokens){
200 buf.append(token.getValue());
201 }
202 return buf.length();
203 }
204
205 }
206 |
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